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          <h2 class="post-title" itemprop="name headline">SpringBoot-对国际化的一些思考
              
            
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        <h2 id="前前言"><a href="#前前言" class="headerlink" title="前前言"></a>前前言</h2><p>  之前所说的博客一个月更新一篇的，已经解决两个月没有更新了，真的是罪过罪过。。。</p>
<h2 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h2><p>  SpringBoot在之前的项目中有使用过，也是需要国际化的。当时做法是设置个参数在url中，觉得不够优雅。<br>  最近在研究国际化的问题，发现自己还是有必要重新学习下Spring呀，大神们都已经帮我们封装好了，而我们却不会用，真的是丢脸啊。。。</p>
<h2 id="一些讲解"><a href="#一些讲解" class="headerlink" title="一些讲解"></a>一些讲解</h2><p>  国际化主要接口是<code>LocaleResolver</code>,就两个方法。<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line"><span class="class"><span class="keyword">interface</span> <span class="title">LocaleResolver</span> </span>&#123;</span><br><span class="line">  <span class="comment">/* 返回Request当前的地区 */</span></span><br><span class="line">  <span class="function">Locale <span class="title">resolveLocale</span><span class="params">(HttpServletRequest request)</span></span>;</span><br><span class="line">  <span class="comment">/* 设置地区 */</span></span><br><span class="line">  <span class="function"><span class="keyword">void</span> <span class="title">setLocale</span><span class="params">(HttpServletRequest request, @Nullable HttpServletResponse response, @Nullable Locale locale)</span></span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<p>自己只需要实现这个接口就可以了。<br>幸好Spring还给了我们4个基本实现。<br><code>AcceptHeaderLocaleResolver</code>,<code>CookieLocaleResolver</code>,<code>FixedLocaleResolver</code>和<code>SessionLocaleResolver</code>.<br> 参考其他前端框架，把地区设置到cookie中，是个比较好的选择，这样就可以和Session解耦，可以Stateless了。</p>
<hr>
<h2 id="直接开干："><a href="#直接开干：" class="headerlink" title="直接开干："></a>直接开干：</h2><h3 id="application-yml-定义配置。"><a href="#application-yml-定义配置。" class="headerlink" title="application.yml 定义配置。"></a><code>application.yml</code> 定义配置。</h3> <figure class="highlight yaml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">messages:</span></span><br><span class="line"><span class="attr">  basename:</span> <span class="string">i18n/messages</span></span><br><span class="line"><span class="attr">  encoding:</span> <span class="string">UTF-8</span></span><br><span class="line"><span class="attr">  use-code-as-default-message:</span> <span class="literal">true</span></span><br><span class="line"><span class="attr">mvc:</span></span><br><span class="line"><span class="attr">  static-path-pattern:</span> <span class="string">/static/**</span></span><br><span class="line"><span class="attr">  date-format:</span> <span class="string">yyyy-MM-dd</span></span><br></pre></td></tr></table></figure>
<h3 id="编写默认国际化语言文件"><a href="#编写默认国际化语言文件" class="headerlink" title="编写默认国际化语言文件"></a>编写默认国际化语言文件</h3><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line">messages_en_US.properties default=default</span><br><span class="line">messages_ja_JP.properties default=デフォルト</span><br><span class="line">messages_zh_CN.properties default=默认</span><br></pre></td></tr></table></figure>
<h3 id="定义Constant类"><a href="#定义Constant类" class="headerlink" title="定义Constant类"></a>定义Constant类</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">I18nConstant</span> </span>&#123;</span><br><span class="line">  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">final</span> String DEFAULT = <span class="string">"default"</span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="配置个MVC配置。"><a href="#配置个MVC配置。" class="headerlink" title="配置个MVC配置。"></a>配置个MVC配置。</h3><p>WebMvcConfig 主要是定义 默认Cookie名，默认地区，支持地区语言，CookieLocaleResolver的Bean和添加一个I18nInterceptor拦截器。<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Configuration</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">WebMvcConfig</span> <span class="keyword">implements</span> <span class="title">WebMvcConfigurer</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Bean</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> LocaleResolver <span class="title">localeResolver</span><span class="params">()</span> </span>&#123;</span><br><span class="line">    CookieLocaleResolver localeResolver = <span class="keyword">new</span> CookieLocaleResolver();</span><br><span class="line">    localeResolver.setDefaultLocale(Locale.CHINA);</span><br><span class="line">    localeResolver.setCookieName(LocaleChangeInterceptor.DEFAULT_PARAM_NAME);</span><br><span class="line">    localeResolver.setCookieMaxAge(<span class="number">60</span> * <span class="number">60</span> * <span class="number">24</span> * <span class="number">365</span>); <span class="comment">// Cookie时效设为1年</span></span><br><span class="line">    <span class="keyword">return</span> localeResolver;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Override</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">addCorsMappings</span><span class="params">(CorsRegistry registry)</span> </span>&#123;</span><br><span class="line">    registry <span class="comment">// 允许所有CORS访问</span></span><br><span class="line">        .addMapping(<span class="string">"/**"</span>)</span><br><span class="line">        .allowedMethods(</span><br><span class="line">            HttpMethod.GET.name(), HttpMethod.POST.name(),</span><br><span class="line">            HttpMethod.PUT.name(), HttpMethod.DELETE.name(),</span><br><span class="line">            HttpMethod.HEAD.name(), HttpMethod.OPTIONS.name()</span><br><span class="line">        );</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Override</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">addInterceptors</span><span class="params">(InterceptorRegistry registry)</span> </span>&#123;</span><br><span class="line">    <span class="comment">// 这里使用默认的Cookie国际化拦截器</span></span><br><span class="line">    registry.addInterceptor(<span class="keyword">new</span> LocaleChangeInterceptor())</span><br><span class="line">        .addPathPatterns(<span class="string">"/**"</span>)</span><br><span class="line">        .excludePathPatterns(<span class="string">"/webjars/**"</span>, <span class="string">"/static/**"</span>);</span><br><span class="line">    <span class="comment">// 拦截器见下面定义</span></span><br><span class="line">    registry.addInterceptor(<span class="keyword">new</span> I18nInterceptor())</span><br><span class="line">        .addPathPatterns(<span class="string">"/**"</span>)</span><br><span class="line">        .excludePathPatterns(<span class="string">"/webjars/**"</span>, <span class="string">"/static/**"</span>);</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<h3 id="编写I18nInterceptor拦截器"><a href="#编写I18nInterceptor拦截器" class="headerlink" title="编写I18nInterceptor拦截器"></a>编写<code>I18nInterceptor</code>拦截器</h3><p>主要做了一件事，postHandle 将<code>I18nConstant</code>中定义的静态常量注册到ModelAndView里，给前端使用。<br><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Component</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">I18nInterceptor</span> <span class="keyword">extends</span> <span class="title">HandlerInterceptorAdapter</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">private</span> <span class="keyword">static</span> Map&lt;String, Object&gt; i18nMaps = <span class="keyword">new</span> HashMap&lt;&gt;();</span><br><span class="line"></span><br><span class="line">  <span class="keyword">static</span> &#123;</span><br><span class="line">    <span class="keyword">try</span> &#123;</span><br><span class="line">      <span class="comment">// 将I18nConstant定义的静态常量放入</span></span><br><span class="line">      Field[] fields = I18nConstant.class.getDeclaredFields();</span><br><span class="line">      <span class="keyword">for</span> (Field field : fields) &#123;</span><br><span class="line">        field.setAccessible(<span class="keyword">true</span>);</span><br><span class="line">        <span class="keyword">if</span> (field.getType().equals(String.class) &amp;&amp; Modifier.isStatic(field.getModifiers())) &#123;</span><br><span class="line">          i18nMaps.put(field.getName(), field.get(I18nConstant.class));</span><br><span class="line">        &#125;</span><br><span class="line">      &#125;</span><br><span class="line">    &#125; <span class="keyword">catch</span> (Exception e) &#123;</span><br><span class="line">      e.printStackTrace();</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Override</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">postHandle</span><span class="params">(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView)</span> </span>&#123;</span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">null</span> != modelAndView) &#123;</span><br><span class="line">      modelAndView.addObject(<span class="string">"i18n"</span>, i18nMaps);</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure></p>
<h3 id="使用多语言。"><a href="#使用多语言。" class="headerlink" title="使用多语言。"></a>使用多语言。</h3><p>这次前端使用的是Freemarker。<br><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">&lt;#--将下列放入Head处 --&gt;</span><br><span class="line">&lt;#import &quot;spring.ftl&quot; as spring&gt;</span><br><span class="line">&lt;#-- 下面两种方法都是可以的 --&gt;</span><br><span class="line">&lt;@spring.message code=&quot;$&#123;i18n.DEFAULT&#125;&quot;/&gt;</span><br><span class="line">&lt;@spring.message code=&quot;default&quot;/&gt;</span><br></pre></td></tr></table></figure></p>
<h3 id="编写API使用类"><a href="#编写API使用类" class="headerlink" title="编写API使用类"></a>编写API使用类</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@Component</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">I18nMessage</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">private</span> <span class="keyword">final</span> HttpServletRequest request;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">private</span> <span class="keyword">final</span> MessageSource messageSource;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Autowired</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> <span class="title">I18nMessage</span><span class="params">(MessageSource messageSource, HttpServletRequest request)</span> </span>&#123;</span><br><span class="line">    <span class="keyword">this</span>.messageSource = messageSource;</span><br><span class="line">    <span class="keyword">this</span>.request = request;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="function"><span class="keyword">public</span> String <span class="title">getMessage</span><span class="params">(String code)</span> </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> getArgsMessage(code, <span class="keyword">null</span>);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="function"><span class="keyword">public</span> String <span class="title">getMessage</span><span class="params">(String code, String defaultMessage)</span> </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> getArgsMessage(code, <span class="keyword">null</span>, defaultMessage);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="function"><span class="keyword">public</span> String <span class="title">getArgsMessage</span><span class="params">(String code, Object[] args)</span> </span>&#123;</span><br><span class="line">    Locale locale = RequestContextUtils.getLocale(request);</span><br><span class="line">    <span class="keyword">return</span> messageSource.getMessage(code, args, locale);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="function"><span class="keyword">public</span> String <span class="title">getArgsMessage</span><span class="params">(String code, Object[] args, String defaultMessage)</span> </span>&#123;</span><br><span class="line">    Locale locale = RequestContextUtils.getLocale(request);</span><br><span class="line">    <span class="keyword">return</span> messageSource.getMessage(code, args, defaultMessage, locale);</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h3 id="Controller使用"><a href="#Controller使用" class="headerlink" title="Controller使用"></a>Controller使用</h3><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@RestController</span></span><br><span class="line"><span class="meta">@RequestMapping</span>(<span class="string">"/api/v1"</span>)</span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">ApiCtl</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">  <span class="keyword">private</span> <span class="keyword">final</span> I18nMessage i18nMessage;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@Autowired</span></span><br><span class="line">  <span class="function"><span class="keyword">public</span> <span class="title">ApiCtl</span><span class="params">(I18nMessage i18nMessage)</span> </span>&#123;</span><br><span class="line">    <span class="keyword">this</span>.i18nMessage = i18nMessage;</span><br><span class="line">  &#125;</span><br><span class="line"></span><br><span class="line">  <span class="meta">@GetMapping</span>(<span class="string">"/i18n"</span>)</span><br><span class="line">  <span class="function"><span class="keyword">public</span> String <span class="title">getI18n</span><span class="params">()</span> </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> i18nMessage.getMessage(I18nConstant.DEFAULT);</span><br><span class="line">  &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
<h2 id="结尾"><a href="#结尾" class="headerlink" title="结尾"></a>结尾</h2><p>这样就可以将国际化的多语言设置好了</p>
<p>注意：<br><code>request.getLocale()</code> 获取的语言并不是自己设置的语言。</p>
<p>获取的话需要使用<code>RequestContextUtils.getLocale(request)</code>。</p>

      
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              <div class="post-toc-content"><ol class="nav"><li class="nav-item nav-level-2"><a class="nav-link" href="#前前言"><span class="nav-number">1.</span> <span class="nav-text">前前言</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#前言"><span class="nav-number">2.</span> <span class="nav-text">前言</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#一些讲解"><span class="nav-number">3.</span> <span class="nav-text">一些讲解</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#直接开干："><span class="nav-number">4.</span> <span class="nav-text">直接开干：</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#application-yml-定义配置。"><span class="nav-number">4.1.</span> <span class="nav-text">application.yml 定义配置。</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#编写默认国际化语言文件"><span class="nav-number">4.2.</span> <span class="nav-text">编写默认国际化语言文件</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#定义Constant类"><span class="nav-number">4.3.</span> <span class="nav-text">定义Constant类</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#配置个MVC配置。"><span class="nav-number">4.4.</span> <span class="nav-text">配置个MVC配置。</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#编写I18nInterceptor拦截器"><span class="nav-number">4.5.</span> <span class="nav-text">编写I18nInterceptor拦截器</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#使用多语言。"><span class="nav-number">4.6.</span> <span class="nav-text">使用多语言。</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#编写API使用类"><span class="nav-number">4.7.</span> <span class="nav-text">编写API使用类</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Controller使用"><span class="nav-number">4.8.</span> <span class="nav-text">Controller使用</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#结尾"><span class="nav-number">5.</span> <span class="nav-text">结尾</span></a></li></ol></div>
            

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  <script type="text/javascript">
    // Popup Window;
    var isfetched = false;
    var isXml = true;
    // Search DB path;
    var search_path = "search.xml";
    if (search_path.length === 0) {
      search_path = "search.xml";
    } else if (/json$/i.test(search_path)) {
      isXml = false;
    }
    var path = "/" + search_path;
    // monitor main search box;

    var onPopupClose = function (e) {
      $('.popup').hide();
      $('#local-search-input').val('');
      $('.search-result-list').remove();
      $('#no-result').remove();
      $(".local-search-pop-overlay").remove();
      $('body').css('overflow', '');
    }

    function proceedsearch() {
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay"></div>')
        .css('overflow', 'hidden');
      $('.search-popup-overlay').click(onPopupClose);
      $('.popup').toggle();
      var $localSearchInput = $('#local-search-input');
      $localSearchInput.attr("autocapitalize", "none");
      $localSearchInput.attr("autocorrect", "off");
      $localSearchInput.focus();
    }

    // search function;
    var searchFunc = function(path, search_id, content_id) {
      'use strict';

      // start loading animation
      $("body")
        .append('<div class="search-popup-overlay local-search-pop-overlay">' +
          '<div id="search-loading-icon">' +
          '<i class="fa fa-spinner fa-pulse fa-5x fa-fw"></i>' +
          '</div>' +
          '</div>')
        .css('overflow', 'hidden');
      $("#search-loading-icon").css('margin', '20% auto 0 auto').css('text-align', 'center');

      

      $.ajax({
        url: path,
        dataType: isXml ? "xml" : "json",
        async: true,
        success: function(res) {
          // get the contents from search data
          isfetched = true;
          $('.popup').detach().appendTo('.header-inner');
          var datas = isXml ? $("entry", res).map(function() {
            return {
              title: $("title", this).text(),
              content: $("content",this).text(),
              url: $("url" , this).text()
            };
          }).get() : res;
          var input = document.getElementById(search_id);
          var resultContent = document.getElementById(content_id);
          var inputEventFunction = function() {
            var searchText = input.value.trim().toLowerCase();
            var keywords = searchText.split(/[\s\-]+/);
            if (keywords.length > 1) {
              keywords.push(searchText);
            }
            var resultItems = [];
            if (searchText.length > 0) {
              // perform local searching
              datas.forEach(function(data) {
                var isMatch = false;
                var hitCount = 0;
                var searchTextCount = 0;
                var title = data.title.trim();
                var titleInLowerCase = title.toLowerCase();
                var content = data.content.trim().replace(/<[^>]+>/g,"");
                
                var contentInLowerCase = content.toLowerCase();
                var articleUrl = decodeURIComponent(data.url);
                var indexOfTitle = [];
                var indexOfContent = [];
                // only match articles with not empty titles
                if(title != '') {
                  keywords.forEach(function(keyword) {
                    function getIndexByWord(word, text, caseSensitive) {
                      var wordLen = word.length;
                      if (wordLen === 0) {
                        return [];
                      }
                      var startPosition = 0, position = [], index = [];
                      if (!caseSensitive) {
                        text = text.toLowerCase();
                        word = word.toLowerCase();
                      }
                      while ((position = text.indexOf(word, startPosition)) > -1) {
                        index.push({position: position, word: word});
                        startPosition = position + wordLen;
                      }
                      return index;
                    }

                    indexOfTitle = indexOfTitle.concat(getIndexByWord(keyword, titleInLowerCase, false));
                    indexOfContent = indexOfContent.concat(getIndexByWord(keyword, contentInLowerCase, false));
                  });
                  if (indexOfTitle.length > 0 || indexOfContent.length > 0) {
                    isMatch = true;
                    hitCount = indexOfTitle.length + indexOfContent.length;
                  }
                }

                // show search results

                if (isMatch) {
                  // sort index by position of keyword

                  [indexOfTitle, indexOfContent].forEach(function (index) {
                    index.sort(function (itemLeft, itemRight) {
                      if (itemRight.position !== itemLeft.position) {
                        return itemRight.position - itemLeft.position;
                      } else {
                        return itemLeft.word.length - itemRight.word.length;
                      }
                    });
                  });

                  // merge hits into slices

                  function mergeIntoSlice(text, start, end, index) {
                    var item = index[index.length - 1];
                    var position = item.position;
                    var word = item.word;
                    var hits = [];
                    var searchTextCountInSlice = 0;
                    while (position + word.length <= end && index.length != 0) {
                      if (word === searchText) {
                        searchTextCountInSlice++;
                      }
                      hits.push({position: position, length: word.length});
                      var wordEnd = position + word.length;

                      // move to next position of hit

                      index.pop();
                      while (index.length != 0) {
                        item = index[index.length - 1];
                        position = item.position;
                        word = item.word;
                        if (wordEnd > position) {
                          index.pop();
                        } else {
                          break;
                        }
                      }
                    }
                    searchTextCount += searchTextCountInSlice;
                    return {
                      hits: hits,
                      start: start,
                      end: end,
                      searchTextCount: searchTextCountInSlice
                    };
                  }

                  var slicesOfTitle = [];
                  if (indexOfTitle.length != 0) {
                    slicesOfTitle.push(mergeIntoSlice(title, 0, title.length, indexOfTitle));
                  }

                  var slicesOfContent = [];
                  while (indexOfContent.length != 0) {
                    var item = indexOfContent[indexOfContent.length - 1];
                    var position = item.position;
                    var word = item.word;
                    // cut out 100 characters
                    var start = position - 20;
                    var end = position + 80;
                    if(start < 0){
                      start = 0;
                    }
                    if (end < position + word.length) {
                      end = position + word.length;
                    }
                    if(end > content.length){
                      end = content.length;
                    }
                    slicesOfContent.push(mergeIntoSlice(content, start, end, indexOfContent));
                  }

                  // sort slices in content by search text's count and hits' count

                  slicesOfContent.sort(function (sliceLeft, sliceRight) {
                    if (sliceLeft.searchTextCount !== sliceRight.searchTextCount) {
                      return sliceRight.searchTextCount - sliceLeft.searchTextCount;
                    } else if (sliceLeft.hits.length !== sliceRight.hits.length) {
                      return sliceRight.hits.length - sliceLeft.hits.length;
                    } else {
                      return sliceLeft.start - sliceRight.start;
                    }
                  });

                  // select top N slices in content

                  var upperBound = parseInt('100');
                  if (upperBound >= 0) {
                    slicesOfContent = slicesOfContent.slice(0, upperBound);
                  }

                  // highlight title and content

                  function highlightKeyword(text, slice) {
                    var result = '';
                    var prevEnd = slice.start;
                    slice.hits.forEach(function (hit) {
                      result += text.substring(prevEnd, hit.position);
                      var end = hit.position + hit.length;
                      result += '<b class="search-keyword">' + text.substring(hit.position, end) + '</b>';
                      prevEnd = end;
                    });
                    result += text.substring(prevEnd, slice.end);
                    return result;
                  }

                  var resultItem = '';

                  if (slicesOfTitle.length != 0) {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + highlightKeyword(title, slicesOfTitle[0]) + "</a>";
                  } else {
                    resultItem += "<li><a href='" + articleUrl + "' class='search-result-title'>" + title + "</a>";
                  }

                  slicesOfContent.forEach(function (slice) {
                    resultItem += "<a href='" + articleUrl + "'>" +
                      "<p class=\"search-result\">" + highlightKeyword(content, slice) +
                      "...</p>" + "</a>";
                  });

                  resultItem += "</li>";
                  resultItems.push({
                    item: resultItem,
                    searchTextCount: searchTextCount,
                    hitCount: hitCount,
                    id: resultItems.length
                  });
                }
              })
            };
            if (keywords.length === 1 && keywords[0] === "") {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-search fa-5x" /></div>'
            } else if (resultItems.length === 0) {
              resultContent.innerHTML = '<div id="no-result"><i class="fa fa-frown-o fa-5x" /></div>'
            } else {
              resultItems.sort(function (resultLeft, resultRight) {
                if (resultLeft.searchTextCount !== resultRight.searchTextCount) {
                  return resultRight.searchTextCount - resultLeft.searchTextCount;
                } else if (resultLeft.hitCount !== resultRight.hitCount) {
                  return resultRight.hitCount - resultLeft.hitCount;
                } else {
                  return resultRight.id - resultLeft.id;
                }
              });
              var searchResultList = '<ul class=\"search-result-list\">';
              resultItems.forEach(function (result) {
                searchResultList += result.item;
              })
              searchResultList += "</ul>";
              resultContent.innerHTML = searchResultList;
            }
          }

          if ('auto' === 'auto') {
            input.addEventListener('input', inputEventFunction);
          } else {
            $('.search-icon').click(inputEventFunction);
            input.addEventListener('keypress', function (event) {
              if (event.keyCode === 13) {
                inputEventFunction();
              }
            });
          }

          // remove loading animation
          $(".local-search-pop-overlay").remove();
          $('body').css('overflow', '');

          proceedsearch();
        }
      });
    }

    // handle and trigger popup window;
    $('.popup-trigger').click(function(e) {
      e.stopPropagation();
      if (isfetched === false) {
        searchFunc(path, 'local-search-input', 'local-search-result');
      } else {
        proceedsearch();
      };
    });

    $('.popup-btn-close').click(onPopupClose);
    $('.popup').click(function(e){
      e.stopPropagation();
    });
    $(document).on('keyup', function (event) {
      var shouldDismissSearchPopup = event.which === 27 &&
        $('.search-popup').is(':visible');
      if (shouldDismissSearchPopup) {
        onPopupClose();
      }
    });
  </script>





  

  

  

  

  
  

  

  

  

  

  

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</html>
